I found out about Lemmy a few years ago when I started looking more at the Fediverse, but I never really felt a need to create an account here as I could just browse around. It wasn’t until recently due to Reddit’s announced changes that I wanted to start interacting here more.
Apart from the inevitable performance issues at times and some weird UI issues I’ve found (lack of error messages when things silently fail, unable to navigate away from a page when something hasn’t been saved, no dedicated community settings page) I’m enjoying my time here.
Instance owners would block that kind of instance based on the activity of its users instead.